package com.lyn.gulimall.auth.controller;

import com.alibaba.fastjson.TypeReference;
import com.lyn.common.constant.AuthServerConstant;
import com.lyn.common.exception.BizCodeEnume;
import com.lyn.common.utils.R;
import com.lyn.common.vo.MemberRespVo;
import com.lyn.gulimall.auth.feign.MemberFeignService;
import com.lyn.gulimall.auth.feign.ThirdPartFeignService;
import com.lyn.gulimall.auth.vo.UserLoginVo;
import com.lyn.gulimall.auth.vo.UserRegistVo;
import org.apache.commons.lang.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Controller;
import org.springframework.validation.BindingResult;
import org.springframework.validation.FieldError;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

import javax.servlet.http.HttpSession;
import javax.validation.Valid;
import java.util.HashMap;
import java.util.Map;
import java.util.UUID;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;

@Controller
public class LoginController {

    /**
     * 发送一个请求直接跳转到一个页面
     * SpringMVC viewcontroller:将请求页面映射过来
     */

    @Autowired
    StringRedisTemplate redisTemplate;

    @Autowired
    private ThirdPartFeignService thirdPartFeignService;
    @Autowired
    private MemberFeignService memberFeignService;

    @ResponseBody
    @GetMapping("/sms/sendcode")
    public R sendCode(@RequestParam("phone") String phone){

        //todo 1、接口防刷
        String redisCode = redisTemplate.opsForValue().get(AuthServerConstant.SMS_CODE_CACHE_PREFIX + phone);
        if(!StringUtils.isEmpty(redisCode)) {
            long l = Long.parseLong(redisCode.split("_")[1]);
            if (System.currentTimeMillis() - l < 60000) {
                return R.error(BizCodeEnume.SMS_CODE_EXCEPTION.getCode(), BizCodeEnume.SMS_CODE_EXCEPTION.getMsg());
            }
        }


        //2、验证码的再次校验。
        String code = UUID.randomUUID().toString().substring(0, 5);
        redisTemplate.opsForValue().set(AuthServerConstant.SMS_CODE_CACHE_PREFIX+phone,
                code+"_"+System.currentTimeMillis(),10, TimeUnit.MINUTES);

        thirdPartFeignService.sendCode(phone,code);
        return R.ok();
    }

    /**
     *  //todo 重定向携带数据，利用session原理，将数据放在session中，只要调到下一个页面取出这个数据以后，session里面的数据就会删掉
     *  //todo 1、分布式下的session问题
     * RedirectAttributes redirectAttributes:模拟重定向携带数据
     * @param vo
     * @param result
     * @param redirectAttributes
     * @return
     */
    @PostMapping("/regist")
    public String regist(@Valid UserRegistVo vo, BindingResult result,
                         RedirectAttributes redirectAttributes){
        if(result.hasErrors()){
            /*result.getFieldErrors().stream().map(fieldError -> {
                String field = fieldError.getField();
                String defaultMessage = fieldError.getDefaultMessage();
                error.put(field,defaultMessage);
            });*/
            Map<String,String> errors=result.getFieldErrors().stream().collect(Collectors.toMap(FieldError::getField,
                    FieldError::getDefaultMessage));
            redirectAttributes.addFlashAttribute("errors",errors);
            //校验出错，转发到注册页
            return "redirect:http://auth.gulimall.com/reg.html";
        }

        //1、校验验证码
        String code = vo.getCode();
        String s = redisTemplate.opsForValue().get(AuthServerConstant.SMS_CODE_CACHE_PREFIX + vo.getPhone());
        if(!StringUtils.isEmpty(s)) {
            if (code.equals(s.split("_")[0])){
                //删除验证码;令牌机制
                redisTemplate.delete(AuthServerConstant.SMS_CODE_CACHE_PREFIX + vo.getPhone());
                //验证码通过    //真正注册。调用远程服务进行注册
                R r = memberFeignService.regist(vo);
                if(r.getCode()==0){
                    //成功
                    return "redirect:http://auth.gulimall.com/login.html";
                }else{
                    Map<String,String> errors=new HashMap<>();
                    errors.put("msg",r.getData("msg",new TypeReference<String>(){}));
                    redirectAttributes.addFlashAttribute("errors",errors);
                    return "redirect:http://auth.gulimall.com/reg.html";
                }
            }else{
                Map<String,String> errors=new HashMap<>();
                errors.put("code","验证码错误");
                redirectAttributes.addFlashAttribute("errors",errors);
                return "redirect:http://auth.gulimall.com/reg.html";
            }
        }else{
            Map<String,String> errors=new HashMap<>();
            errors.put("code","验证码错误");
            redirectAttributes.addFlashAttribute("errors",errors);
            return "redirect:http://auth.gulimall.com/reg.html";
        }

        //注册成功回到首页，回到登录页
//        return "redirect:/login.html";
    }

    @GetMapping("/login.html")
    public String loginPage(HttpSession session){
        Object attribute = session.getAttribute(AuthServerConstant.LOGIN_USER);
        Object msg = session.getAttribute("msg");
        if(attribute==null) {
            return "login";
        }else{
            return "redirect:http://gulimall.com";
        }
    }

    @PostMapping("/login")
    public String login(UserLoginVo vo, RedirectAttributes redirectAttributes,
                        HttpSession session){

        //远程登录
        R r = memberFeignService.login(vo);
        if(r.getCode()==0) {
            //成功
            MemberRespVo data = r.getData("data", new TypeReference<MemberRespVo>() {
            });
            session.setAttribute(AuthServerConstant.LOGIN_USER,data);
            return "redirect:http://gulimall.com";
        }else{
            Map<String,String> errors=new HashMap<>();
            errors.put("msg",r.getData("msg",new TypeReference<String>(){}));
            redirectAttributes.addFlashAttribute("errors",errors);
            return "redirect:http://auth.gulimall.com/login.html";
        }
    }
}
